18789981

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 31584384

約数和(自身を除く): 12794403

約数列:

[1, 3, 7, 17, 21, 49, 51, 73, 103, 119, 147, 219, 309, 357, 511, 721, 833, 1241, 1533, 1751, 2163, 2499, 3577, 3723, 5047, 5253, 7519, 8687, 10731, 12257, 15141, 22557, 26061, 36771, 52633, 60809, 85799, 127823, 157899, 182427, 257397, 368431, 383469, 894761, 1105293, 2684283, 6263327, 18789981]

約数ペア:

[(1, 18789981), (3, 6263327), (7, 2684283), (17, 1105293), (21, 894761), (49, 383469), (51, 368431), (73, 257397), (103, 182427), (119, 157899), (147, 127823), (219, 85799), (309, 60809), (357, 52633), (511, 36771), (721, 26061), (833, 22557), (1241, 15141), (1533, 12257), (1751, 10731), (2163, 8687), (2499, 7519), (3577, 5253), (3723, 5047)]